compat/glob.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Guido van Rossum.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #if defined(LIBC_SCCS) && !defined(lint)
  38 #if 0
  39 static char sccsid[] = "@(#)glob.c      8.3 (Berkeley) 10/13/93";
  40 #else
  41 static char rcsid[] = "$OpenBSD: glob.c,v 1.8 1998/08/14 21:39:30 deraadt Exp $";
  42 #endif
  43 #endif /* LIBC_SCCS and not lint */
  44
  45 /*
  46  * glob(3) -- a superset of the one defined in POSIX 1003.2.
  47  *
  48  * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
  49  *
  50  * Optional extra services, controlled by flags not defined by POSIX:
  51  *
  52  * GLOB_QUOTE:
  53  *      Escaping convention: \ inhibits any special meaning the following
  54  *      character might have (except \ at end of string is retained).
  55  * GLOB_MAGCHAR:
  56  *      Set in gl_flags if pattern contained a globbing character.
  57  * GLOB_NOMAGIC:
  58  *      Same as GLOB_NOCHECK, but it will only append pattern if it did
  59  *      not contain any magic characters.  [Used in csh style globbing]
  60  * GLOB_ALTDIRFUNC:
  61  *      Use alternately specified directory access functions.
  62  * GLOB_TILDE:
  63  *      expand ~user/foo to the /home/dir/of/user/foo
  64  * GLOB_BRACE:
  65  *      expand {1,2}{a,b} to 1a 1b 2a 2b
  66  * gl_matchc:
  67  *      Number of matches in the current invocation of glob.
  68  */
  69
  70 #include <config.h>
  71
  72 #include <sys/param.h>
  73 #include <sys/stat.h>
  74
  75 #include <dirent.h>
  76 #include <errno.h>
  77 #include <pwd.h>
  78 #include <stdio.h>
  79
  80 #ifdef STDC_HEADERS
  81 # include <stdlib.h>
  82 # include <string.h>
  83 #endif
  84
  85 #ifdef HAVE_UNISTD_H
  86 # include <unistd.h>
  87 #endif
  88
  89 #include <compat.h>
  90
  91
  92 #define DOLLAR          '$'
  93 #define DOT             '.'
  94 #define EOS             '\0'
  95 #define LBRACKET        '['
  96 #define NOT             '!'
  97 #define QUESTION        '?'
  98 #define QUOTE           '\\'
  99 #define RANGE           '-'
 100 #define RBRACKET        ']'
 101 #define SEP             '/'
 102 #define STAR            '*'
 103 #define TILDE           '~'
 104 #define UNDERSCORE      '_'
 105 #define LBRACE          '{'
 106 #define RBRACE          '}'
 107 #define SLASH           '/'
 108 #define COMMA           ','
 109
 110 #ifndef DEBUG
 111
 112 #define M_QUOTE         0x8000
 113 #define M_PROTECT       0x4000
 114 #define M_MASK          0xffff
 115 #define M_ASCII         0x00ff
 116
 117 typedef u_short Char;
 118
 119 #else
 120
 121 #define M_QUOTE         0x80
 122 #define M_PROTECT       0x40
 123 #define M_MASK          0xff
 124 #define M_ASCII         0x7f
 125
 126 typedef char Char;
 127
 128 #endif
 129
 130
 131 #define CHAR(c)         ((Char)((c)&M_ASCII))
 132 #define META(c)         ((Char)((c)|M_QUOTE))
 133 #define M_ALL           META('*')
 134 #define M_END           META(']')
 135 #define M_NOT           META('!')
 136 #define M_ONE           META('?')
 137 #define M_RNG           META('-')
 138 #define M_SET           META('[')
 139 #define ismeta(c)       (((c)&M_QUOTE) != 0)
 140
 141
 142 static int       compare (const void *, const void *);
 143 static void      g_Ctoc (const Char *, char *);
 144 static int       g_lstat (Char *, struct stat *, glob_t *);
 145 static DIR      *g_opendir (Char *, glob_t *);
 146 static Char     *g_strchr (Char *, int);
 147 #ifdef notdef
 148 static Char     *g_strcat (Char *, const Char *);
 149 #endif
 150 static int       g_stat (Char *, struct stat *, glob_t *);
 151 static int       glob0 (const Char *, glob_t *);
 152 static int       glob1 (Char *, glob_t *);
 153 static int       glob2 (Char *, Char *, Char *, glob_t *);
 154 static int       glob3 (Char *, Char *, Char *, Char *, glob_t *);
 155 static int       globextend (const Char *, glob_t *);
 156 static const Char *     globtilde (const Char *, Char *, size_t, glob_t *);
 157 static int       globexp1 (const Char *, glob_t *);
 158 static int       globexp2 (const Char *, const Char *, glob_t *, int *);
 159 static int       match (Char *, Char *, Char *);
 160 #ifdef DEBUG
 161 static void      qprintf (const char *, Char *);
 162 #endif
 163
 164 int
 165 openbsd_glob(pattern, flags, errfunc, pglob)
 166         const char *pattern;
 167         int flags, (*errfunc) __P((const char *, int));
 168         glob_t *pglob;
 169 {
 170         const u_char *patnext;
 171         int c;
 172         Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
 173
 174         patnext = (u_char *) pattern;
 175         if (!(flags & GLOB_APPEND)) {
 176                 pglob->gl_pathc = 0;
 177                 pglob->gl_pathv = NULL;
 178                 if (!(flags & GLOB_DOOFFS))
 179                         pglob->gl_offs = 0;
 180         }
 181         pglob->gl_flags = flags & ~GLOB_MAGCHAR;
 182         pglob->gl_errfunc = errfunc;
 183         pglob->gl_matchc = 0;
 184
 185         bufnext = patbuf;
 186         bufend = bufnext + MAXPATHLEN;
 187         if (flags & GLOB_NOESCAPE)
 188             while (bufnext < bufend && (c = *patnext++) != EOS)
 189                     *bufnext++ = c;
 190         else {
 191                 /* Protect the quoted characters. */
 192                 while (bufnext < bufend && (c = *patnext++) != EOS)
 193                         if (c == QUOTE) {
 194                                 if ((c = *patnext++) == EOS) {
 195                                         c = QUOTE;
 196                                         --patnext;
 197                                 }
 198                                 *bufnext++ = c | M_PROTECT;
 199                         }
 200                         else
 201                                 *bufnext++ = c;
 202         }
 203         *bufnext = EOS;
 204
 205         if (flags & GLOB_BRACE)
 206                 return globexp1(patbuf, pglob);
 207         else
 208                 return glob0(patbuf, pglob);
 209 }
 210
 211 /*
 212  * Expand recursively a glob {} pattern. When there is no more expansion
 213  * invoke the standard globbing routine to glob the rest of the magic
 214  * characters
 215  */
 216 static int globexp1(pattern, pglob)
 217         const Char *pattern;
 218         glob_t *pglob;
 219 {
 220         const Char* ptr = pattern;
 221         int rv;
 222
 223         /* Protect a single {}, for find(1), like csh */
 224         if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
 225                 return glob0(pattern, pglob);
 226
 227         while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL)
 228                 if (!globexp2(ptr, pattern, pglob, &rv))
 229                         return rv;
 230
 231         return glob0(pattern, pglob);
 232 }
 233
 234
 235 /*
 236  * Recursive brace globbing helper. Tries to expand a single brace.
 237  * If it succeeds then it invokes globexp1 with the new pattern.
 238  * If it fails then it tries to glob the rest of the pattern and returns.
 239  */
 240 static int globexp2(ptr, pattern, pglob, rv)
 241         const Char *ptr, *pattern;
 242         glob_t *pglob;
 243         int *rv;
 244 {
 245         int     i;
 246         Char   *lm, *ls;
 247         const Char *pe, *pm, *pl;
 248         Char    patbuf[MAXPATHLEN + 1];
 249
 250         /* copy part up to the brace */
 251         for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
 252                 continue;
 253         ls = lm;
 254
 255         /* Find the balanced brace */
 256         for (i = 0, pe = ++ptr; *pe; pe++)
 257                 if (*pe == LBRACKET) {
 258                         /* Ignore everything between [] */
 259                         for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
 260                                 continue;
 261                         if (*pe == EOS) {
 262                                 /*
 263                                  * We could not find a matching RBRACKET.
 264                                  * Ignore and just look for RBRACE
 265                                  */
 266                                 pe = pm;
 267                         }
 268                 }
 269                 else if (*pe == LBRACE)
 270                         i++;
 271                 else if (*pe == RBRACE) {
 272                         if (i == 0)
 273                                 break;
 274                         i--;
 275                 }
 276
 277         /* Non matching braces; just glob the pattern */
 278         if (i != 0 || *pe == EOS) {
 279                 *rv = glob0(patbuf, pglob);
 280                 return 0;
 281         }
 282
 283         for (i = 0, pl = pm = ptr; pm <= pe; pm++)
 284                 switch (*pm) {
 285                 case LBRACKET:
 286                         /* Ignore everything between [] */
 287                         for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
 288                                 continue;
 289                         if (*pm == EOS) {
 290                                 /*
 291                                  * We could not find a matching RBRACKET.
 292                                  * Ignore and just look for RBRACE
 293                                  */
 294                                 pm = pl;
 295                         }
 296                         break;
 297
 298                 case LBRACE:
 299                         i++;
 300                         break;
 301
 302                 case RBRACE:
 303                         if (i) {
 304                             i--;
 305                             break;
 306                         }
 307                         /* FALLTHROUGH */
 308                 case COMMA:
 309                         if (i && *pm == COMMA)
 310                                 break;
 311                         else {
 312                                 /* Append the current string */
 313                                 for (lm = ls; (pl < pm); *lm++ = *pl++)
 314                                         continue;
 315                                 /*
 316                                  * Append the rest of the pattern after the
 317                                  * closing brace
 318                                  */
 319                                 for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
 320                                         continue;
 321
 322                                 /* Expand the current pattern */
 323 #ifdef DEBUG
 324                                 qprintf("globexp2:", patbuf);
 325 #endif
 326                                 *rv = globexp1(patbuf, pglob);
 327
 328                                 /* move after the comma, to the next string */
 329                                 pl = pm + 1;
 330                         }
 331                         break;
 332
 333                 default:
 334                         break;
 335                 }
 336         *rv = 0;
 337         return 0;
 338 }
 339
 340
 341
 342 /*
 343  * expand tilde from the passwd file.
 344  */
 345 static const Char *
 346 globtilde(pattern, patbuf, patbuf_len, pglob)
 347         const Char *pattern;
 348         Char *patbuf;
 349         size_t patbuf_len;
 350         glob_t *pglob;
 351 {
 352         struct passwd *pwd;
 353         char *h;
 354         const Char *p;
 355         Char *b, *eb;
 356
 357         if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
 358                 return pattern;
 359
 360         /* Copy up to the end of the string or / */
 361         eb = &patbuf[patbuf_len - 1];
 362         for (p = pattern + 1, h = (char *) patbuf;
 363             h < (char *)eb && *p && *p != SLASH; *h++ = *p++)
 364                 continue;
 365
 366         *h = EOS;
 367
 368         if (((char *) patbuf)[0] == EOS) {
 369                 /*
 370                  * handle a plain ~ or ~/ by expanding $HOME
 371                  * first and then trying the password file
 372                  */
 373 #ifdef HAVE_ISSETUGID
 374                 if (issetugid() != 0 || (h = getenv("HOME")) == NULL) {
 375 #endif
 376                         if ((pwd = getpwuid(getuid())) == NULL)
 377                                 return pattern;
 378                         else
 379                                 h = pwd->pw_dir;
 380 #ifdef HAVE_ISSETUGID
 381                 }
 382 #endif
 383         }
 384         else {
 385                 /*
 386                  * Expand a ~user
 387                  */
 388                 if ((pwd = getpwnam((char*) patbuf)) == NULL)
 389                         return pattern;
 390                 else
 391                         h = pwd->pw_dir;
 392         }
 393
 394         /* Copy the home directory */
 395         for (b = patbuf; b < eb && *h; *b++ = *h++)
 396                 continue;
 397
 398         /* Append the rest of the pattern */
 399         while (b < eb && (*b++ = *p++) != EOS)
 400                 continue;
 401         *b = EOS;
 402
 403         return patbuf;
 404 }
 405
 406
 407 /*
 408  * The main glob() routine: compiles the pattern (optionally processing
 409  * quotes), calls glob1() to do the real pattern matching, and finally
 410  * sorts the list (unless unsorted operation is requested).  Returns 0
 411  * if things went well, nonzero if errors occurred.  It is not an error
 412  * to find no matches.
 413  */
 414 static int
 415 glob0(pattern, pglob)
 416         const Char *pattern;
 417         glob_t *pglob;
 418 {
 419         const Char *qpatnext;
 420         int c, err, oldpathc;
 421         Char *bufnext, patbuf[MAXPATHLEN+1];
 422
 423         qpatnext = globtilde(pattern, patbuf, sizeof(patbuf) / sizeof(Char),
 424             pglob);
 425         oldpathc = pglob->gl_pathc;
 426         bufnext = patbuf;
 427
 428         /* We don't need to check for buffer overflow any more. */
 429         while ((c = *qpatnext++) != EOS) {
 430                 switch (c) {
 431                 case LBRACKET:
 432                         c = *qpatnext;
 433                         if (c == NOT)
 434                                 ++qpatnext;
 435                         if (*qpatnext == EOS ||
 436                             g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) {
 437                                 *bufnext++ = LBRACKET;
 438                                 if (c == NOT)
 439                                         --qpatnext;
 440                                 break;
 441                         }
 442                         *bufnext++ = M_SET;
 443                         if (c == NOT)
 444                                 *bufnext++ = M_NOT;
 445                         c = *qpatnext++;
 446                         do {
 447                                 *bufnext++ = CHAR(c);
 448                                 if (*qpatnext == RANGE &&
 449                                     (c = qpatnext[1]) != RBRACKET) {
 450                                         *bufnext++ = M_RNG;
 451                                         *bufnext++ = CHAR(c);
 452                                         qpatnext += 2;
 453                                 }
 454                         } while ((c = *qpatnext++) != RBRACKET);
 455                         pglob->gl_flags |= GLOB_MAGCHAR;
 456                         *bufnext++ = M_END;
 457                         break;
 458                 case QUESTION:
 459                         pglob->gl_flags |= GLOB_MAGCHAR;
 460                         *bufnext++ = M_ONE;
 461                         break;
 462                 case STAR:
 463                         pglob->gl_flags |= GLOB_MAGCHAR;
 464                         /* collapse adjacent stars to one,
 465                          * to avoid exponential behavior
 466                          */
 467                         if (bufnext == patbuf || bufnext[-1] != M_ALL)
 468                             *bufnext++ = M_ALL;
 469                         break;
 470                 default:
 471                         *bufnext++ = CHAR(c);
 472                         break;
 473                 }
 474         }
 475         *bufnext = EOS;
 476 #ifdef DEBUG
 477         qprintf("glob0:", patbuf);
 478 #endif
 479
 480         if ((err = glob1(patbuf, pglob)) != 0)
 481                 return(err);
 482
 483         /*
 484          * If there was no match we are going to append the pattern
 485          * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
 486          * and the pattern did not contain any magic characters
 487          * GLOB_NOMAGIC is there just for compatibility with csh.
 488          */
 489         if (pglob->gl_pathc == oldpathc) {
 490                 if ((pglob->gl_flags & GLOB_NOCHECK) ||
 491                     ((pglob->gl_flags & GLOB_NOMAGIC) &&
 492                     !(pglob->gl_flags & GLOB_MAGCHAR)))
 493                         return(globextend(pattern, pglob));
 494                 else
 495                         return(GLOB_NOMATCH);
 496         }
 497         if (!(pglob->gl_flags & GLOB_NOSORT))
 498                 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
 499                     pglob->gl_pathc - oldpathc, sizeof(char *), compare);
 500         return(0);
 501 }
 502
 503 static int
 504 compare(p, q)
 505         const void *p, *q;
 506 {
 507         return(strcmp(*(char **)p, *(char **)q));
 508 }
 509
 510 static int
 511 glob1(pattern, pglob)
 512         Char *pattern;
 513         glob_t *pglob;
 514 {
 515         Char pathbuf[MAXPATHLEN+1];
 516
 517         /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
 518         if (*pattern == EOS)
 519                 return(0);
 520         return(glob2(pathbuf, pathbuf, pattern, pglob));
 521 }
 522
 523 /*
 524  * The functions glob2 and glob3 are mutually recursive; there is one level
 525  * of recursion for each segment in the pattern that contains one or more
 526  * meta characters.
 527  */
 528 static int
 529 glob2(pathbuf, pathend, pattern, pglob)
 530         Char *pathbuf, *pathend, *pattern;
 531         glob_t *pglob;
 532 {
 533         struct stat sb;
 534         Char *p, *q;
 535         int anymeta;
 536
 537         /*
 538          * Loop over pattern segments until end of pattern or until
 539          * segment with meta character found.
 540          */
 541         for (anymeta = 0;;) {
 542                 if (*pattern == EOS) {          /* End of pattern? */
 543                         *pathend = EOS;
 544                         if (g_lstat(pathbuf, &sb, pglob))
 545                                 return(0);
 546
 547                         if (((pglob->gl_flags & GLOB_MARK) &&
 548                             pathend[-1] != SEP) && (S_ISDIR(sb.st_mode)
 549                             || (S_ISLNK(sb.st_mode) &&
 550                             (g_stat(pathbuf, &sb, pglob) == 0) &&
 551                             S_ISDIR(sb.st_mode)))) {
 552                                 *pathend++ = SEP;
 553                                 *pathend = EOS;
 554                         }
 555                         ++pglob->gl_matchc;
 556                         return(globextend(pathbuf, pglob));
 557                 }
 558
 559                 /* Find end of next segment, copy tentatively to pathend. */
 560                 q = pathend;
 561                 p = pattern;
 562                 while (*p != EOS && *p != SEP) {
 563                         if (ismeta(*p))
 564                                 anymeta = 1;
 565                         *q++ = *p++;
 566                 }
 567
 568                 if (!anymeta) {         /* No expansion, do next segment. */
 569                         pathend = q;
 570                         pattern = p;
 571                         while (*pattern == SEP)
 572                                 *pathend++ = *pattern++;
 573                 } else                  /* Need expansion, recurse. */
 574                         return(glob3(pathbuf, pathend, pattern, p, pglob));
 575         }
 576         /* NOTREACHED */
 577 }
 578
 579 static int
 580 glob3(pathbuf, pathend, pattern, restpattern, pglob)
 581         Char *pathbuf, *pathend, *pattern, *restpattern;
 582         glob_t *pglob;
 583 {
 584         register struct dirent *dp;
 585         DIR *dirp;
 586         int err;
 587         char buf[MAXPATHLEN];
 588
 589         /*
 590          * The readdirfunc declaration can't be prototyped, because it is
 591          * assigned, below, to two functions which are prototyped in glob.h
 592          * and dirent.h as taking pointers to differently typed opaque
 593          * structures.
 594          */
 595         struct dirent *(*readdirfunc)();
 596
 597         *pathend = EOS;
 598         errno = 0;
 599
 600         if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
 601                 /* TODO: don't call for ENOENT or ENOTDIR? */
 602                 if (pglob->gl_errfunc) {
 603                         g_Ctoc(pathbuf, buf);
 604                         if (pglob->gl_errfunc(buf, errno) ||
 605                             pglob->gl_flags & GLOB_ERR)
 606                                 return (GLOB_ABORTED);
 607                 }
 608                 return(0);
 609         }
 610
 611         err = 0;
 612
 613         /* Search directory for matching names. */
 614         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 615                 readdirfunc = pglob->gl_readdir;
 616         else
 617                 readdirfunc = readdir;
 618         while ((dp = (*readdirfunc)(dirp))) {
 619                 register u_char *sc;
 620                 register Char *dc;
 621
 622                 /* Initial DOT must be matched literally. */
 623                 if (dp->d_name[0] == DOT && *pattern != DOT)
 624                         continue;
 625                 for (sc = (u_char *) dp->d_name, dc = pathend;
 626                      (*dc++ = *sc++) != EOS;)
 627                         continue;
 628                 if (!match(pathend, pattern, restpattern)) {
 629                         *pathend = EOS;
 630                         continue;
 631                 }
 632                 err = glob2(pathbuf, --dc, restpattern, pglob);
 633                 if (err)
 634                         break;
 635         }
 636
 637         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 638                 (*pglob->gl_closedir)(dirp);
 639         else
 640                 closedir(dirp);
 641         return(err);
 642 }
 643
 644
 645 /*
 646  * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
 647  * add the new item, and update gl_pathc.
 648  *
 649  * This assumes the BSD realloc, which only copies the block when its size
 650  * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
 651  * behavior.
 652  *
 653  * Return 0 if new item added, error code if memory couldn't be allocated.
 654  *
 655  * Invariant of the glob_t structure:
 656  *      Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
 657  *      gl_pathv points to (gl_offs + gl_pathc + 1) items.
 658  */
 659 static int
 660 globextend(path, pglob)
 661         const Char *path;
 662         glob_t *pglob;
 663 {
 664         register char **pathv;
 665         register int i;
 666         u_int newsize;
 667         char *copy;
 668         const Char *p;
 669
 670         newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
 671         pathv = pglob->gl_pathv ?
 672                     realloc((char *)pglob->gl_pathv, newsize) :
 673                     malloc(newsize);
 674         if (pathv == NULL) {
 675                 if (pglob->gl_pathv)
 676                         free(pglob->gl_pathv);
 677                 return(GLOB_NOSPACE);
 678         }
 679
 680         if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
 681                 /* first time around -- clear initial gl_offs items */
 682                 pathv += pglob->gl_offs;
 683                 for (i = pglob->gl_offs; --i >= 0; )
 684                         *--pathv = NULL;
 685         }
 686         pglob->gl_pathv = pathv;
 687
 688         for (p = path; *p++;)
 689                 continue;
 690         if ((copy = malloc(p - path)) != NULL) {
 691                 g_Ctoc(path, copy);
 692                 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
 693         }
 694         pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
 695         return(copy == NULL ? GLOB_NOSPACE : 0);
 696 }
 697
 698
 699 /*
 700  * pattern matching function for filenames.  Each occurrence of the *
 701  * pattern causes a recursion level.
 702  */
 703 static int
 704 match(name, pat, patend)
 705         register Char *name, *pat, *patend;
 706 {
 707         int ok, negate_range;
 708         Char c, k;
 709
 710         while (pat < patend) {
 711                 c = *pat++;
 712                 switch (c & M_MASK) {
 713                 case M_ALL:
 714                         if (pat == patend)
 715                                 return(1);
 716                         do
 717                             if (match(name, pat, patend))
 718                                     return(1);
 719                         while (*name++ != EOS);
 720                         return(0);
 721                 case M_ONE:
 722                         if (*name++ == EOS)
 723                                 return(0);
 724                         break;
 725                 case M_SET:
 726                         ok = 0;
 727                         if ((k = *name++) == EOS)
 728                                 return(0);
 729                         if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
 730                                 ++pat;
 731                         while (((c = *pat++) & M_MASK) != M_END)
 732                                 if ((*pat & M_MASK) == M_RNG) {
 733                                         if (c <= k && k <= pat[1])
 734                                                 ok = 1;
 735                                         pat += 2;
 736                                 } else if (c == k)
 737                                         ok = 1;
 738                         if (ok == negate_range)
 739                                 return(0);
 740                         break;
 741                 default:
 742                         if (*name++ != c)
 743                                 return(0);
 744                         break;
 745                 }
 746         }
 747         return(*name == EOS);
 748 }
 749
 750 /* Free allocated data belonging to a glob_t structure. */
 751 void
 752 openbsd_globfree(pglob)
 753         glob_t *pglob;
 754 {
 755         register int i;
 756         register char **pp;
 757
 758         if (pglob->gl_pathv != NULL) {
 759                 pp = pglob->gl_pathv + pglob->gl_offs;
 760                 for (i = pglob->gl_pathc; i--; ++pp)
 761                         if (*pp)
 762                                 free(*pp);
 763                 free(pglob->gl_pathv);
 764         }
 765 }
 766
 767 static DIR *
 768 g_opendir(str, pglob)
 769         register Char *str;
 770         glob_t *pglob;
 771 {
 772         char buf[MAXPATHLEN];
 773
 774         if (!*str)
 775                 strcpy(buf, ".");
 776         else
 777                 g_Ctoc(str, buf);
 778
 779         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 780                 return((*pglob->gl_opendir)(buf));
 781
 782         return(opendir(buf));
 783 }
 784
 785 static int
 786 g_lstat(fn, sb, pglob)
 787         register Char *fn;
 788         struct stat *sb;
 789         glob_t *pglob;
 790 {
 791         char buf[MAXPATHLEN];
 792
 793         g_Ctoc(fn, buf);
 794         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 795                 return((*pglob->gl_lstat)(buf, sb));
 796         return(lstat(buf, sb));
 797 }
 798
 799 static int
 800 g_stat(fn, sb, pglob)
 801         register Char *fn;
 802         struct stat *sb;
 803         glob_t *pglob;
 804 {
 805         char buf[MAXPATHLEN];
 806
 807         g_Ctoc(fn, buf);
 808         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 809                 return((*pglob->gl_stat)(buf, sb));
 810         return(stat(buf, sb));
 811 }
 812
 813 static Char *
 814 g_strchr(str, ch)
 815         Char *str;
 816         int ch;
 817 {
 818         do {
 819                 if (*str == ch)
 820                         return (str);
 821         } while (*str++);
 822         return (NULL);
 823 }
 824
 825 #ifdef notdef
 826 static Char *
 827 g_strcat(dst, src)
 828         Char *dst;
 829         const Char* src;
 830 {
 831         Char *sdst = dst;
 832
 833         while (*dst++)
 834                 continue;
 835         --dst;
 836         while((*dst++ = *src++) != EOS)
 837             continue;
 838
 839         return (sdst);
 840 }
 841 #endif
 842
 843 static void
 844 g_Ctoc(str, buf)
 845         register const Char *str;
 846         char *buf;
 847 {
 848         register char *dc;
 849
 850         for (dc = buf; (*dc++ = *str++) != EOS;)
 851                 continue;
 852 }
 853
 854 #ifdef DEBUG
 855 static void
 856 qprintf(str, s)
 857         const char *str;
 858         register Char *s;
 859 {
 860         register Char *p;
 861
 862         (void)printf("%s:\n", str);
 863         for (p = s; *p; p++)
 864                 (void)printf("%c", CHAR(*p));
 865         (void)printf("\n");
 866         for (p = s; *p; p++)
 867                 (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
 868         (void)printf("\n");
 869         for (p = s; *p; p++)
 870                 (void)printf("%c", ismeta(*p) ? '_' : ' ');
 871         (void)printf("\n");
 872 }
 873 #endif